Finding the Third Proportional to 143,913 and 215,886.38

Step by Step Solution

1. Step 1: Write the proportion equation
   143,913 : 215,886.38 = 215,886.38 : x
2. Step 2: Convert to fraction form
   143,913/215,886.38 = 215,886.38/x
3. Step 3: Cross multiply
   143,913x = 215,886.38 × 215,886.38
4. Step 4: Simplify right side
   143,913x = 46,606,926,910.64
5. Step 5: Solve for x
   x = 46,606,926,910.64/143,913
6. Step 6: Final answer
   x = 323,854.88